Ultrasonic welding is to convert 50/60 Hz current into 15, 20, 30 or 40 KHz
power by ultrasonic generator.The converted highfrequency electric energy is
again converted by the transducer into mechanical motion of the same frequency,
and then the mechanical motion is transmitted to the welding head
through a set of horn devices that can change the amplitude.
The welding head transfers the received vibration energy to the joint of the
workpiece which wait for welding.
In this area, the vibrational energy is converted into thermal energy by friction
to melt the plastic. Ultrasound can not only be used to weld hard thermoplastics,
but also fabrics and films.